For the reaction , the equilibrium concentrations are [A] = 0.1, [B] = 0.4 and [C] = 0.2 mol·dm⁻³. Calculate Kc.
Answer and explanation
Correct answer: A.
- Step 1: .
- Step 2: .
Answer
.
Why not the others: : the concentration of C was not squared. : the reactant concentrations were multiplied into the numerator. : the coefficient 2 was used as a multiplier instead of an exponent.
Practise more Acids, bases and chemical equilibrium.
Free questions with an explanation for every one, and full timed South Africa Matric mock tests.
More Acids, bases and chemical equilibrium questions
- A catalyst increases the rate of a reaction because it
- Increasing the temperature increases the rate of a reaction mainly because
- For the equilibrium N₂(g) + 3H₂(g) ⇌ 2NH₃(g), increasing the pressure at constant temperature will
- Adding a catalyst to a reaction mixture at equilibrium will
- The forward reaction in an equilibrium is exothermic. Increasing the temperature will
- Which of the following is the conjugate base of HCl?